Paint and varnish base.



UNITED STATES PATENT OFFICE.

RUDOLF LENDER AND ALBEBT' KOCH, 0F NEU-BABELSBERG, GERMANY.

PAINT 'AND VARNISH BASE.

Patented-Mar. 5, 1912.

Serial No. 860,899.

1,019,666. Specification of Letters Patent. no Drawing. Application fllcd November 17, 1011.

To all whom it may concern:

and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to a varnish base to beused in the manufacture of varnishes, lacquers, enamels and paints as a binder in the manufacture of linoleums, lincrusta and oil cloths.

The preparation of Chinese wood oil, so called Tong oil for paints and varnishes by the admixture therewith of resins as colophonium, copal, &c. has been attempted, but such products have been more or less unsatisfactory in producing a commercial article to satisfy the demands of the users.

We have found by many experiments that the practical objections to mixtures or varnishes and paint bases is entirely overcome if we use in place of resins the polymerization products of that group of chemical compoundsknown as the cumarone and in'- dene group, of which e. g. parindene and paracumarone are types.

We proceed as follows: Ten kilos of Chinese wood oil or Tong oil is heated to.

' sults a homogeneous mass which is hard when cold. This substance then becomes the base from which the varnish, lac, enamel or similar painters material is made. This base is then heated and mixed with a suitable solvent as liquid hydrocarbons (e.

terpenes, and a clear liquid results.

g.- benzin, li roin, benzol obtained from petroleum or rom different kind of tar) and chlorinated hydrocarbons (e. 9. carbon tetrachlorate), also turpentine oil and ot ll iler e amount of solvent used is dependent upon the consistency of the product desired and the use to be made of it. It may be thinned at will. To the mixture of base and solvent may be added any desired colorin matter and the varnish or paint dries rapidly to a brilliant, hard but elastice coating, impervious to'liquids' and unattacked by gases. It has exceptional resistance to water, acids alkalis, heat and cold.

A varnish, paint or other similar prodnot of this substance has a much wider range of use than any other similar product, or an other product containing Chinese wood oil and resins. For example, it does not become tacky; it does not set by the addition of such pigments as lead or zinc compounds.

The polymerization products prevent the decomposition of the wood oil, which the resins dov not accomplish.

We claim 1. Process of manufacturing a paint and varnish base, which comprises mixing Chinese wood oil (Tong oil) with a polymerization product of the cumarone and lndene group of compounds at a temperature above 100 C.

2. A paint or varnish base comprising Chinese wood oil (Tong oil) and one or more of the polymerization products of the cumarone and indene group.

In testimony that we clalm the foregoing as our invention, we have signed our names in presence of two subscribing witnesses.

RUDOLF LENDER. ALBERT KOCH. Witnesses:

HENRY HASPER, RICHARD Gon'rz. 

